The connector
The Molex 393570020 is a 20-position single-level Eurostyle 39357 terminal block with side-entry screw rising cage clamp, rated 12 A per circuit at 300 V and sized for 16–28 AWG wire. The 3.50 mm pitch and through-hole PCB mount make it a board-termination block rather than a DIN-rail feed-through — it accepts the conductor at the clamp and solders directly to the board at the tail. The housing is black polyamide (nylon) rated over -40°C to 105°C, so it handles the thermal swing found in enclosed equipment panels.
Where this class of block is used
Twenty-position Eurostyle blocks of this profile terminate discrete conductors at a PCB node — motor drives, PLC I/O cards, power supplies, and industrial instrumentation where field wiring needs to land on a fixed board-level bus. The rising cage clamp lets a technician land a ferrule or bare end without removing the screw, which speeds panel termination in the field without special tooling beyond a T-handle hex key.